CN105084467A - Processing reactor of printing and dyeing waste water with catalytic electrode - Google Patents
Processing reactor of printing and dyeing waste water with catalytic electrode Download PDFInfo
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- CN105084467A CN105084467A CN201410184831.9A CN201410184831A CN105084467A CN 105084467 A CN105084467 A CN 105084467A CN 201410184831 A CN201410184831 A CN 201410184831A CN 105084467 A CN105084467 A CN 105084467A
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Abstract
The invention discloses a processing reactor of printing and dyeing waste water with a catalytic electrode including an electrolytic tank, a power supply and a titanium electrode. The reactor is characterized in that the titanium electrode employs a self-made sheet titanium matrix coating, and the self-made sheet titanium matrix is processed by using physical and chemical treatment method to remove the titanium oxide-film and enable a fresh uniform titanium sheet to be exposed. The processing reactor of printing and dyeing waste water with catalytic electrode employs the titanium matrix coating electrode processor, which has excellent decolorization effect and great removing organic matter and ammonia nitrogen capability in processing the printing and dyeing waste water. The processing reactor has excellent decolorization effect, less sludge, short processing time and long serving life.
Description
Technical field
The invention belongs to a kind of wastewater treatment equipment, relate to a kind of employing catalysis electrode treatment of dyeing wastewater reactor concretely.
Background technology
Dyeing is typical high water consumption industry, need consume the technique softening water of nearly hundred million tons every year.Dyeing waste water source and pollutant component very complicated, have the features such as change of water quality is large, organic content is high, colourity high (being mainly colored dyes), directly discharge brings high risks to human health and living environment, causes the waste of water resources simultaneously.Along with country and the pay attention to day by day of society to environmental protection requirement and the requirement to Sustainable development, traditional treatment process is more and more difficult to the requirement meeting production and environmental protection.The main processing ways of current China dyeing waste water still based on chemical treatment of carrying out a biological disposal upon, but is difficult to the required pollutant discharge amount that is up to state standards.Have patent to be 201310018326.2(Graphene-Ti electrode treatment of dyeing wastewater electrochemical reactor) the inside teach the equipment that dyeing waste water is processed, but for the apparatus structure described in this patent also exist improvement may.
Summary of the invention
The invention provides a kind of catalysis electrode treatment of dyeing wastewater reactor, have decolorizing effect remarkable, have the ability of organics removal, and have good ammonia nitrogen removal ability, sludge output is few, and the treatment time is short, long service life.
Technical scheme of the present invention is: a kind of
catalysis electrode treatment of dyeing wastewaterreactor, comprises electrolyzer, power supply, Ti electrode, it is characterized in that, described Ti electrode is for adopting self-control sheet Titanium base coating, described self-control sheet Titanium base carries out physics and chemistry process for passing through, and the oxide film of removing titanium, makes it expose fresh uniform titanium sheet.Technical scheme of the present invention has the advantages such as production cost is low, low energy, high reaction efficiency, and work-ing life was more than 0.62, colourity and the organism of dyeing waste water can not only be removed efficiently, and the ability of dyeing waste water ammonia nitrogen can be removed efficiently.
Further: the surfactivity layer of described Titanium base coating adopts SnO2-Sb-CeO2.The technical program have employed SnO2-Sb-CeO2 active coating, has physical stability and chemical stability and the anti-poisoning capability of height, can not be poisoning because of intermediate product or impurity effect, thus loses activity.There is very high electric conductivity simultaneously, the transmission for electronics provide one stable, be unlikely to the passage that causes fatal voltage to fall; Preparation method is simple to operation, with low cost; Electro-catalytic coating and matrix adhesive force by force, not easily degrade and wear and tear, and have the ability of anti-electrolytic solution erosion, and to ensure that electrocatalysis characteristic does not decline, coating has higher specific surface area.
Further: between Titanium base and surfactivity layer, to adopt Mn, Ni, Cu as middle layer.The technical program has to form Solid solution with active coating and surfactivity layer and to have erosion resistance to strong acid and has good electroconductibility simultaneously; And well can be combined with Titanium base.
beneficial effect
The invention has the beneficial effects as follows: the present invention adopts ti-based coating Electrode treatment device, it is remarkable that this equipment not only has decolorizing effect to treatment of dyeing wastewater, the ability of organics removal, and have good ammonia nitrogen removal ability; This equipment decolorizing effect is remarkable, and sludge output is few, and the treatment time is short, long service life.
Accompanying drawing explanation
Fig. 1 is that in the present invention, Titanium base electrode coating is in the structural representation in electrolyzer
Fig. 2 is the SEM figure of Mn-Cu-Ni electrode active surface layer of the present invention
Embodiment
As one embodiment of the present invention, as shown in Figure 1, a kind of catalysis electrode treatment of dyeing wastewater reactor, comprises electrolyzer, power supply 2 and Ti electrode 3, and described power supply 2 is current regulator power supply; Described Ti electrode is positioned at electrolyzer, Ti electrode plate is as positive plate, negative plate 4 is all positioned at electrolyzer, described Ti electrode is for adopting self-control sheet Titanium base coating, described self-control sheet Titanium base carries out physics and chemistry process for passing through, the oxide film of removing titanium, makes it expose fresh uniform titanium sheet.Titanium is a kind of grey metal, and molar mass is 47.87g/mol, and be arranged in periodictable the IVth subgroup, valence shell structure is 3d24s2, and general chemical valence state is+3 ,+4.Titanium exists with forms such as ilmenite (FeTiO3), rutile (TiO2) at occurring in nature, and the content in the earth's crust is very abundant, is only second to ferro-aluminum magnesium, occupies the 4th.The fusing point of titanium, up to 1660 DEG C, is α-hexagonal close packed lattice under room temperature.The intensity of titanium and the ratio of density higher than iron and aluminium, large 1 times of its strength ratio pure iron, almost high than fine aluminium 5 times.Titanium is as structural metal, and its mechanical property is between high-quality steel and high strength light alloy, and be better than a series of refractory metal and heating resisting metal and alloy thereof, general titanium alloy tensile strength can reach 700-1200MPa.Therefore, the strength ratio of titanium alloy other any material current is all large.Titanium and its alloys can keep its mechanical property at low temperatures, at-253 DEG C, still have enough toughness; At high temperature titanium alloy also can keep the performance under its room temperature.Now, the temperature that commercial titanium alloy uses for a long time can reach more than 500 DEG C, and aluminium is at 150 DEG C, and namely stainless steel loses its original performance at 310 DEG C.Because this experiment adopts electrode needed for thermal oxidation method preparation experiment, therefore electrode base material must be the material that too large change all can not occur for a kind of at high temperature its chemical property and physical properties, and obviously, titanium can meet above-mentioned requirements.
In addition due to the low price of titanium, easy to process, more stable in electrochemical reaction, therefore reactor of the present invention adopts titanium as body material.
Because titanium has high avidity to oxygen; thin and the firm oxide film of one deck can be formed in an oxygen-containing environment; make it in a lot of strong corrosive media in passive state; and this layer of oxide film is very firm; even if breakage also can regenerate immediately, titanium that Here it is has the reason of good corrosion resistance nature in neutrality, alkalescence, oxidizing acid solution, organic acid soln and oxidizing atmosphere.The oxide film conductivity of titanium is poor, in order to reduce the resistance of electrode, simultaneously also in order to make activated coating and titanium electrode substrate combine closely better, removes this layer of oxide film necessary.Therefore before preparing electrode, physics and chemistry process must be carried out to titanium sheet, the oxide film of removing titanium, make it expose fresh uniform titanium surface.
The catalytic activity of the electrocatalysis of electrode is mainly from activated coating, and metal oxide has semiconductor property, and what application was maximum at present is its Oxygen anodic evolution and analyses chlorine character.In organic removal in environmental engineering, main its oxygen evolution potential of application and high catalytic activity character.As a kind of working electrode, except possessing except the general requirement of working electrode, the particular requirement to electrocatalysis also to be met:
The physical stability of a, height and chemical stability.In electrochemical process, electro catalytic activity can be maintained and stablize, within the usage period, all there is high catalytic activity.There is different requirements in the life-span of different industrial application to electro catalytic electrode, generally in electrolytic industry, require that electrode is when overpotential is less than 100mv, can produce the current density of 0.1 ~ 1A/cm2, and work-ing life is more than 1 year.
B, there is certain anti-poisoning capability, can not be poisoning because of intermediate product or impurity effect, thus lose activity.
C, very high electric conductivity, the transmission for electronics provide one stable, be unlikely to the passage that causes fatal voltage to fall.Preparation method is simple to operation, with low cost.
D, electro-catalytic coating and matrix adhesive force are strong, not easily degrade and wear and tear, and have the ability of anti-electrolytic solution erosion, and to ensure that electrocatalysis characteristic does not decline, coating has higher specific surface area.
SnO2 can be with scope quite wide, reaches 3.5eV, and is corrosion resistant to acid or alkali, therefore has good chemical stability and electrochemical stability; Simultaneously SnO2 has higher electroconductibility, and its most high conductivity can reach 3 × 10-3 Ω-1cm-1.The Effective Doping of antimony (Sb) can improve the electroconductibility of SnO2, reduces the resistivity of SnO2.
Cerium (Ce) is the one of rare earth element, and its compound has special optical, electrical and magnetic property.The oxidation capacity of CeO2 is very strong, and be a main compound of rare earth family, its Nature comparison is stablized, and water insoluble and alkaline solution, is insoluble in hydrochloric acid and hydrogen peroxide.The thermostability of CeO2 is higher, can remain unchanged when 800 DEG C, 980 DEG C time, lose some oxygen.Therefore attempt containing CeO2 metal oxide electrode in making top coat, make it for sewage disposal.
For the Material selec-tion between Titanium base and active coating in the present invention: containing the metallic oxide coating electrode in middle layer, in use degree of polarization is very not large, the transition layer that several titanyl compound is formed can be produced between Titanium base and top coat, be mainly: Detitanium-ore-type, brookite type and rutile-type, wherein general with rutile-type, rutile-type resistivity is up to 108 Ω, once formation rutile TiO_2, the resistance of coating of metal oxides will increase substantially.Simultaneously, along with the prolongation of polarization time, think that top coat and titanium base matrix will separate by the transition layer of TiO2 master gradually, when TiO2 differs larger with the lattice dimensions of top coat with unit cell dimension, just be difficult to form Solid solution, in this case, when TiO2 directly contacts with top coat, the internal stress of electrode sharply rises, and the bonding force of top coat and Titanium base just sharply declines and causes coating shedding.This experiment have employed the method introducing the middle layer that nascent oxygen can be stoped to permeate and have high conductivity, erosion resistance and catalytic performance between Titanium base and surfactivity layer, with the performance of the electrode in the life-span of intensifier electrode.The selection of intermediate layer material should meet following requirements:
(1) Solid solution can be formed with active coating and surfactivity layer;
(2) to strong acid, there is erosion resistance;
(3) there is good electroconductibility;
(4) well can be combined with Titanium base.
The middle layer of this experiment is (Mn, Ni, Cu).From the character of SnO2 itself, the erosion resistance of SnO2 in acid solution is very strong.Life-span and the electro catalytic activity of electrode is improved by adding the middle layer containing Mn, Ni, Cu.
Fig. 2 is the SEM figure of Ti/Mn-Cu-Ni/SnO2-Sb-CeO2 electrode active surface layer, amplify 5000 times, can find out to there is reticulated structure in the crack of Ti/Mn-Cu-Ni/SnO2-Sb-CeO2 electrode, the oxygen that this reticulated structure can stop electrolytic solution and degradation process to produce is to the diffusion of coating and Ti matrix combining site, decrease the formation of TiO2 insulation layer on Ti matrix, thus can electrode life be extended, this explains the longest reason Ti/Mn-Cu-Ni/SnO2-Sb-CeO2 electrode life.
Above exhaustive presentation is carried out to a kind of catalysis electrode treatment of dyeing wastewater reactor provided by the present invention, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.To change of the present invention with to improve to be possible, and design and scope that accessory claim can specify can not be exceeded.
Claims (3)
1. a catalysis electrode treatment of dyeing wastewater reactor, comprise electrolyzer, power supply, Ti electrode, it is characterized in that, described Ti electrode is for adopting self-control sheet Titanium base coating, described self-control sheet Titanium base carries out physics and chemistry process for passing through, the oxide film of removing titanium, makes it expose fresh uniform titanium sheet.
2. a kind of catalysis electrode treatment of dyeing wastewater reactor according to claim 1, is characterized in that: the surfactivity layer of described Titanium base coating adopts SnO2-Sb-CeO2.
3. a kind of catalysis electrode treatment of dyeing wastewater reactor according to claim 2, is characterized in that: between Titanium base and surfactivity layer, adopt Mn, Ni, Cu as middle layer.
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Cited By (4)
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| CN108128853A (en) * | 2017-12-29 | 2018-06-08 | 苏州科技大学 | Cerium dopping manganese oxide electrode, preparation method and the usage |
| CN108147503A (en) * | 2017-12-29 | 2018-06-12 | 苏州科技大学 | Manganese oxide electrode, preparation method and the usage |
| CN108217850A (en) * | 2017-12-29 | 2018-06-29 | 苏州科技大学 | Er ions manganese oxide electro catalytic electrode, preparation method and the usage |
| CN112010399A (en) * | 2020-07-20 | 2020-12-01 | 西安怡速安智能科技有限公司 | Anode coating formula for decolorizing of electrochemical electrode |
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Cited By (6)
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| CN108128853A (en) * | 2017-12-29 | 2018-06-08 | 苏州科技大学 | Cerium dopping manganese oxide electrode, preparation method and the usage |
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| CN108217850A (en) * | 2017-12-29 | 2018-06-29 | 苏州科技大学 | Er ions manganese oxide electro catalytic electrode, preparation method and the usage |
| CN108217850B (en) * | 2017-12-29 | 2021-02-05 | 苏州科技大学 | Erbium-doped manganese oxide electrocatalytic electrode and preparation method and application thereof |
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| CN112010399A (en) * | 2020-07-20 | 2020-12-01 | 西安怡速安智能科技有限公司 | Anode coating formula for decolorizing of electrochemical electrode |
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Application publication date: 20151125 |